README.TXT Driver File Contents (

[Files Descriptions]

    This VxD Driver only supports SiS 5591(or 5592)/5595 chipset and 
	under Microsoft Windows 95 OSR2.1.
    This miniport driver only supports 5591(or 5592)/5595 chipset and 
	under Windows 98.
	SiS Power Management Controller Driver Installation Information File.

[System Requirement]

(1) Windows 95 OSR2.1 or Windows 98 Beta2
   #Microsoft Windows 95 OSR2.1
    You need use "Usbsupp.exe" from Microsoft to upgrade Win95 OSR2 to OSR2.1.
    In order to make sure your system is running on OSR2.1, 
    You can run "regedit.exe" (included in Microsoft Windows 95) to find the
    subkey "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion", 
    and check if the value of "VersionNumber" is either "4.03.1212"or"4.03.1214".

(2) Install Microsoft DirectX5 version 1.22 or later.
    Only DirectX5 or later will enable AGP supports on OSR2.1.

(3) The system BIOS must be most updated(ex:later than Ver07 of SiS BIOS).

[Installation Instructions]

(1) Run program "SETUP.EXE" in the SiS 5591 GART VxD driver floppy and it will
    install the SiS VxD Driver or SiS miniport driver automatically onto your
    Windows 95 OSR2.1 or Windows 98 system.


Q: How to decide the APSIZE in the system BIOS setting?
A: APSIZE is used by GART VxD to create GART table. Totally there are
   (APSIZE/4K) entries and per entry is 4 bytes for a pointer address.
   So GARTReserve is limited by the total entries number.

   GART VxD uses a magic constant number, 12M bytes, to decide up to
   how many system memory can be commited by GARTCommit. That is, if
   system memory is 32M bytes, user can commit up to (32M-12M) bytes.

   Whereas APSIZE and MaxCommitableSize are two different things. User
   maybe successfully reserve 32M bytes non-local memory, but perhaps
   can only commit up to 20M bytes. Of course if user reserves too
   many or commit too many, either function will return failure to user.
Download Driver Pack

How To Update Drivers Manually

After your driver has been downloaded, follow these simple steps to install it.

  • Expand the archive file (if the download file is in zip or rar format).

  • If the expanded file has an .exe extension, double click it and follow the installation instructions.

  • Otherwise, open Device Manager by right-clicking the Start menu and selecting Device Manager.

  • Find the device and model you want to update in the device list.

  • Double-click on it to open the Properties dialog box.

  • From the Properties dialog box, select the Driver tab.

  • Click the Update Driver button, then follow the instructions.

Very important: You must reboot your system to ensure that any driver updates have taken effect.

For more help, visit our Driver Support section for step-by-step videos on how to install drivers for every file type.

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